baber/WOPTO huggingface dataset:
Patent GB-337357-A (GB)
Title: An improved process for the production of urea aldehyde resins
IPC: C08L61/24
Filed: 1929-04-27
Abstract: 337,357. Triggs, W. W., (Toledo Scale Manufacturing Co.). April 27, 1929. Urea-formaldehyde resins. - Urea is reacted with formaldehpde in aqueous solution to form an initial condensation product, the solution is concentrated, a polybasic acid-polyhydric alcohol condensation product is then added, and the solution again concentrated. In carrying out the process it is preferable to add the urea in stages, the acidity being adjusted during the process by means of triethanolamine. In an example, formaldehyde in 30 to 40 per cent solution is reacted with urea in the proportion of 2 to 2.2 mols. of formaldehyde to one mol. of urea, the pH value being brought to from 5 to 6 by the addition of triethanolamine. After initial condensation the pH is increased to from 7 to 8 and the solution evaporated to a thick syrup. A non- aqueous solvent such as butyl alcohol or the monomethyl ether of ethylene glycol is added and the boiling continued, additional urea being introduced to combine with the remaining free formaldehyde. The final ratio of formaldehyde to urea should be less than 2 : 1, preferably 1.75: 1. Sufficient of a solution in alcohol of a polybasic acid-polyhydric alcohol is then added to lower the pH value to between 3.5 and 5, and the mixture is dried by heating in vacuo. The resulting powder may be moulded under pressure and finally cured by heating without pressure. Part of the urea in the process may be replaced by thiourea.
Patent GB-131822-A (GB)
IPC: B65D41/42
Filed: 1919-01-30
Abstract: 131,822. Horsfield, G. W. Jan. 30, 1919. Capsule closures.-Relates to capsules and like closures for bottles and of the kind comprising a tearable metal capsule provided with a central pull-tab. The tab portion j is joined with an unweakened or non-slotted annulus and the nature of the tab and length of the junction between the tab and annulus are such that when the tab is pulled the annulus is torn along lines which do not intersect before the edge of the capsule is reached. The tab is preferably stiffened by means of concentric ribs or corrugations l, m, the outer one m extending around the arc h of severance only. The capsule is provided with the usual cork or other washer f and a sheet-metal disk g, which may be formed with a central raised boss n of smaller diameter than the tab j.
Patent GB-639537-A (GB)
Title: Improvements in and relating to follow-up electric control systems
IPC: G05D3/12
Filed: 1946-05-01
Abstract: 639,537. Electric control systems. BRITISH THOMSON-HOUSTON CO., Ltd. (General Electric Co.). May 1, 1946, No. 13183. [Class 40 (i)] In a follow-up control system, means responsive to positional disagreement between a driven object 10 and a pilot device 11 are provided for producing a signal voltage which causes a motor 12 to drive the object into positional agreement with the pilot device, anti-hunting means being provided which is responsive to positional disagreement above a predetermined amount for reducing the signal voltage and hence the synchronizing torque of the motor. The energization of the motor 12 from the supply 20 is controlled by valves 14, 15, the grids 14a, 15a of which may be supplied through an input transformer 26 with a signal voltage from Selsyn motors 28, 11 the latter forming the pilot device. For preventing hunting during normal follow-up operation of the system, a capacitor 31 is connected to the grids 14a, 15a in series with stabilizing resistors 25, 27 and is supplied with a voltage proportional to the speed of motor 12, i.e. from a tachometer generator 32 driven by said motor so as to modify the signal voltage in accordance with the rate of change of speed of motor 12. Should the speed of motor 12 exceed a predetermined amount, such as may occur when the system is switched on with a large positional disagreement between the object 10 and pilot device 11, further antihunting means are brought into action comprising gas containing triode valves 35, 36 having starting anodes 35b, 36b and cathodes 35a, 36a connected across the secondary windings of a transformer 37 connected in the signal-voltage circuit, and main anodes 35c, 36c which with the cathodes 35a, 36a are connected across the.capacitor 31. Thus should the signal voltage and the voltage supplied by the tachometer generator exceed a predetermined value sufficient to cause conduction between the cathode and main anode of one of the valves 35, 36 (depending upon the direction of operation of the system), the capacitor 31 is byepassed and the signal voltage modified to reduce the synchronizing torque.
Patent GB-1419278-A (GB)
Title: Process for preparing cemented tungsten carbide
IPC: C22C1/05
Filed: 1973-03-20
Abstract: 1419278 Sintered cemented carbides UNION CARBIDE CORP 20 March 1973 [21 March 1972] 13250/73 Heading C7D Sintered cemented tungsten carbide is made by ball milling a powder mixture of W, sufficient graphite to form WC 3-20 wt per cent Co for a time no longer than that needed to produce a cold pressed green compact of maximum density. The ball milled mixture is then cold pressed and sintered e.g. at 1350-1550‹C. The W powder is preferably 2-2¢ micron, the Co powder 1-1¢ micron and the graphite - 200 mesh. Up to 10 wt per cent of one of TaC, TiC, Cr 3 C 2 , VC and NbC or up to 20% total of more than one may be added to the mixture before ball milling. The amount of graphite included in the mixture is Œ 0.1% of the stoichiometric amount for forming WC with the W. The required milling time varies 58-128 hours and the compacts are sintered in a packing of 25% graphite and 75% Al 2 O 3 .
Patent GB-228767-A (GB)
Title: Improvements in or relating to door and other locks
IPC: E05B63/20
Filed: 1924-05-30
Abstract: 228,767. Synovec, R. May 30, 1924. Night - latches; latches, sliding; keys; locks, revolving-barrel. -A square-ended bolt is held retracted bv a catch released when the door is slammed, and is released from inside by a handle which is provided with locking means, and from outside by a key. The bolt 2 is normally held retracted by a catch 4 pivoted on the slam-bolt 6 so that when the door is closed, the bolt 6 is pushed inwards, releasing the catch 4 from the rib 3 on the bottom of the bolt and allowing the bolt to be shot by its spring 12. Release is effected from inside by turning the spindle 8 by a handle, when the follower 9 acts on the arm 11 of the bolt. When the bolt is shot, the follower 9 is turned forwards by the spring 14 to the position shown in dotted lines in Fig. 2. In the position it can be ]ocked against movement by pushing the plunger 28 forward by the square end 31 of the key 32 inserted into the hollow 30 of the plunger and turning it till cross pins 33 in it engage a projection on the housing 27 to hold the plunger in engagement over the follower. Release from outside is effected by the key 32 inserted into the barrel IS and operating tumblers 19, the follower 23 of the barrel engaging an arm 16 pivoted at one end 15 to the holt and loosely embracing the barrel 18 with its other end.
Patent GB-541605-A (GB)
Title: Improvements in friction brakes
IPC: F16D51/52
Filed: 1940-08-23
Abstract: 541,605. Vehicle brakes. GENERAL MOTORS CORPORATION. Aug. 23, 1940, No. 13382. Convention date, Sept. 16, 1939. [Class 103 (i)] In a friction brake, an example of which is shown in Figs. 1 and 3, having a pair of shoes to engage a drum when their upper ends are pushed apart. by hydraulic or other spreading means 25 the lower ends of the shoes are anchored and connected so that each shoe is adapted to be self-energizing and to act as a servo-device for the other shoe, the mechan- -ism comprising a lever, positioned between the lower ends of the shoes and having two alternative fulcrum pins 71 and 73, and links such as 85 pivoted to each shoe and engaging the lever near the fulcrum pin (71 in the case of link 85) about which 'turning of the lever takes place in actuating the other shoe and at a distance from the axis of the fulcrum pin less than the pin radius. The lever comprises first links 69, 69<SP>1</SP> and second links 75, 75<SP>1</SP> all supported by pin 67, the second links receiving the other ends of the links 85, pivoted on the shoes, in flared slots, and external retaining plates 81, 81<SP>1</SP> being carried by pins 67 and 73. Means of adjustment are provided in the spreading means 25 and in the links pivoted to the lower end of one of the shoes. Reference is made to Specification 436,902. The Specification as open to inspection under Sect. 91, shows in Fig. 9 (Cancelled) a simple lever 217 for transmitting the face from one shoe to the other, the lever turning alternatively about a pin 227 or about the edge of a slot 233 in a fixed part 219. In a modification a sheet metal wheel cylinder is employed an independent anchorage to take the thrust if one the shoes being provided. This subject-matter does not appear in the Specification as accepted.
Patent GB-356103-A (GB)
Title: Improvements in and relating to rotary fans
IPC: F04D29/40
Filed: 1930-05-01
Abstract: 356,103. Centrifugal fans. BRITISH REMA MANUFACTURING CO., Ltd. and HOWDEN, P., Hubert Works, Highroad Well, Halifax, Yorkshire. May 1, 1930, No. 13401. [Class 110 (i).] Casings.-Gases containing powdered material enter the casing B of a centrifugal fan through an inlet pipe D which is tangential to a chamber A. The chamber A is concentric with the fan so that the incoming gases are given an initial whirling movement and enter the fan chamber spirally. The delivery pipe is divided by a hinged valve F which can be moved by a handle G to close an outlet or occupy a mid-way position.
Patent GB-1465429-A (GB)
Title: Closure for fire sections in ventilating and air conditioning  systems
IPC: A62C2/12
Filed: 1975-04-02
Abstract: 1465429 Valves TROX GmbH Gebr 2 April 1975 [2 April 1974] 13408/75 Heading F2V [Also in Division A5] A fire closure in a ventilating or air conditioning duct comprises a casing 1 divided into two parts 2a and 2b between which there is an asbestos ring 3 and a pivotally mounted anti-fire gate 5 made of asbestos cement which, when closed, abuts against strips 6 and asbestos foam insert 7 as seal.
Patent GB-670354-A (GB)
Title: Dyestuff compositions
IPC: C09B67/28
Filed: 1949-05-19
Abstract: Dyestuff compositions are manufactured by incorporating a basic pyrazolone compound with a salt of an acid polybasic acid ester (especially an acid sulphuric acid ester) of a leuco vat dyestuff. The process is applicable particularly to the preparation of printing pastes, which may contain the usual additional ingredients (e.g. diluents such as sodium sulphate or carbonate, anti-foaming and wetting agents, organic fillers such as dextrose or dextrins, and oxidation catalysts such as ammonium vanadate), and to which the basic pyrazolone compound may be added directly or after first mixing it with the leuco ester salt.  Examples describe the admixture of the following substances: (1) the sodium salt of the leuco sulphuric ester of an anthraquinone-acridine dyestuff, 1 - phenyl - 2 : 3 - dimethyl - 5 - pyrazolone and sodium sulphate (the mixture then being dissolved in water, together with b  : b 1 dihydroxydiethyl sulphide and urea and the solution added to a printing paste for cotton, containing starch - tragacanth thickening sodium chlorate, ammonium vanadate, ammonia and gluconic acid); (2) the disodium salt of the leuco sulphuric ester of 2 : 1-naphthioindigo and 1 - phenyl - 2 : 3 - dimethyl - 5 - pyrazolone (incorporated in a printing paste as in (1) except that the gluconic acid is replaced by ammonium thiocyanate); (3) the disodium salt of the leuco sulphuric ester of mixed di- and trichlorinated isodibenzanthrones and 1-phenyl-2 : 3-dimethyl-5-pyrazolone; (4) as in (3) with the addition of corn syrup and soda ash; (5) the dye derivative of (1) and 1-phenyl-3-methyl-5-pyrazolone; (6) the tetrasodium salt of the leuco sulphuric ester of 2 : 1,5 : 4-anthraquinonedi-phenylthiazole and 1-phenyl-2 : 3-dimethyl-4-amino-5-pyrazolone; (7) the dye derivative of (6), 1-phenyl-2 : 3-dimethyl-5-pyrazolone and dextrose (the mixture being dissolved as in (1) and the solution added to a mixture of starch-tragacanth thickening and sodium chromate solution).  For comparison, the 1-phenyl-2 : 3-dimethyl-5-pyrazolone in (1) and (2) is replaced by sodium gluconate and that in (7) by glucose.  A list of further pyrazolones is given, 1-phenyl-2 : 3 - dimethyl - 4 - dimethylamino - 5 - pyrazolone being indicated as particularly important.  Specification 557,478 is referred to.
Patent GB-1254068-A (GB)
Title: Method of and apparatus for controlling temperature of a gas stream
IPC: F17C13/02
Filed: 1969-03-14
Abstract: 1,254,068. Automatic temperature control systems. DUNLOP HOLDINGS Ltd. March 14, 1969 [March 20, 1968], No. 13432/69. Heading G3R. A method of controlling the temperature of a gas stream flowing in a chamber comprises injecting into the stream a low boiling point liquid which vapourizes and absorbs heat from the gas, measuring the temperature of the gas and regulating the supply and absorption of heat to achieve the required temperature. Preferably the gas stream is recirculated continuously and at times the heat supply or absorption may be cut off completely. The liquid may be mechanically atomized after injection or may be atomized electrostatically. The liquid may be liquid nitrogen having a boiling point of -196‹ C. A chamber is formed by a core 2 surrounded by a box like structure 1 containing a fan 7 operating in a throat 9, 10 with a conduit 12 discharging the liquid through a nozzle 13 into the fan blades to mechanically atomize the liquid. Current to a plurality of heaters 14 is controlled by a platinum resistance thermometer 21 disposed in a test chamber 5 which may house, for example, an apparatus for testing torsion of materials. An inert gas may be introduced into the chamber and the heating may be performed by the injection of preheated gas. The heaters 14 should preferably have a low heat capacity thus giving a rapid supply of heat to the gas stream.
Patent GB-744183-A (GB)
Title: Improvements in or relating to systems for regulating vehicular traffic in main thoroughfares
IPC: G08G1/082
Filed: 1953-05-13
Abstract: 744,183. Road signals for controlling traffic. SIEMENS & HALSKE AGT.-GES. May 13, 1953 [May 19, 1952], No. 13437/53. Class 118(2) In a progressive system in which the timing of main light signals S located at the intersections of side roads with a main road are correlated to facilitate the uninterrupted passage of vehicles along the main road at a constant, predetermined speed, the smooth flow of traffic is further ensured by locating a preliminary light signal PS a distance, e.g. 50 metres, in advance of each main signal equal to that required by a normal vehicle to accelerate from rest to the predetermined speed. The main and preliminary signals both display the same conventional sequence of coloured lights, in red, red with amber, green, amber...but the timing of each preliminary signal is advanced relative to that of its associated main signal by the time taken to travel between them. The Figure shows such an arrangement for a main road Str with a central tram track tr and traffic travelling on the right-hand side of the road. A pedestrian crossing F and an island i for tram passengers are located between signals S and PS. A further signal FS is located at the crossing F to protect it from traffic filtering into the main road from the side road, the timing of signal FS being so related to that of the main signal S that the filtering traffic joins the main traffic stream in the correct phase. Additional intermediate signals JS (Fig. 6. not shown) which display only the green "go" condition may be located between two sets of main signals, the timing of each intermediate signal being displaced relative to that of the main signals by an amount proportional to its distance from them. Preferably, the intermediate signals are so numerous that a strip of green light appears to travel along the main road at the predetermined speed, the length of the strip being equal to the product of the predetermined speed and the "go" time of the signals. The intermediate signals JS may comprise luminous studs in the centre of the road or they may be located in the kerbstones at the edges of the road and at the edges of the central tram tracks alternate ones of such an array of signals may be directed in opposite direction along the main road (Fig. 1, not shown). Advance signals AS, Fig 6 (not shown), similar to the intermediate signals JS may be located before the first crossing in order to filter traffic approaching the controlled zone into groups travelling at the requisite speed. Traffic now diagrams illustrating the effect of the invention are given in Figs. 1, 2, 3 and 6 (not shown).
Patent GB-561741-A (GB)
Title: Improvements in and relating to floating structures
IPC: B63B35/50
Filed: 1942-09-25
Abstract: 561,741. Floating structures. CREED, F. G., and FLOATING STATIONS, Ltd. Sept. 25, 1942, No. 13501. [Class 113 (ii)] A mobile floating structure, suitable for use as a sea-drome or for carrying passengers, comprises a pair of parallel longitudinal buoyant bodies 5 supporting a superstructure 1 above wave level. The bodies 5 are circular in cross-section. with a diameter greater than the width of hollow vertical side chambers 2, 3 which provide reserve buoyancy, and the superstructure may consist of an upper flight deck 10 and a lower hangar 20, the deck 10 slightly overhanging side decks 11 for guns 18. Lifts 55 ... 58 and a control tower 59 are provided, as well as propellers 60 at one or both tapered.ends of the bodies 5, and a pair of rudders 61. The chambers 2, 3 are, divided into water-tight compartments by horizontal bulkheads 28, 29 and transverse bulkheads 36, whilst the bodies 5 are divided into watertight compartments by vertical bulkheads 41, 42, horizontal bulkheads 43, and transverse bulkheads. Ballast and anti-rolling tanks may be fitted at 52.
Patent GB-233539-A (GB)
Title: Improvements relating to coin-freed mechanism for gas meters
IPC: G07F15/02
Filed: 1924-06-02
Abstract: 233,539. Smith, E. W., and Smith Meters, Ltd. June 2, 1924. Coin action, thrust and multiple-coin.-In mechanism of the kind described in Specification 219,252 in which a coin by engagement with the inside of the coin mechanism casing depresses a pivoted coin table into engagement with a toothed wheel, the coin table 7, Fig. 2, pivoted at 8 to a rotatable disc 4 is flat and has an upstanding arm 9 located between the pivot 8 and a coin-carrier 12 on the disc 4. The arm 9 has a tooth 10 to engage the quantity wheel 5, Fig. 3, when the table is depressed against the action of a spring 11. To adjust the size of the carrier for use with coins of different denominations, a block 14 is slidably mounted on the tables and is secured in position by a screw 15 and spring washer. The quantity wheel has teeth of sawtooth shape, that is, radial on one side and incJined on the other, and is controlled by a spring washer to prevent too easy rotation.
Patent GB-327605-A (GB)
Title: Improvements in or in connection with the supply of pulverised fuel to burners
IPC: F23K3/00
Filed: 1929-05-01
Abstract: 327,605. Soc. Anon. des Appareils de Manutention et Fours Stein. Oct. 26, 1928, [Convention date]. Fuel, feeding.-Apparatus for feeding pulverized fuel to furnaces comprises a pulverizer 1 from which the fuel is withdrawn suspended in air by a fan 2 and delivered through a pipe line 4, connected also to the fan inlet and having branches 6 connected to burners, a control valve 7 being arranged in the pipe line between the branch leading to the last burner and the fan. The pipe line 4 is reduced in section after the various branch pipes 6 by cylindro-conical connectors 5. Each branch pipe leading to a burner is provided, as shown in Fig. 3, with a vertically adjustable and rotatable spoon-like member 9 provided with a valve 14 and projecting into the pipe line 4.
Patent GB-846543-A (GB)
Title: Resilient couplings
IPC: F16D3/38
Filed: 1955-05-11
Abstract: 846,543. Universal joints. STANDAGE, L. E. G., [representative of STANDAGE, C. A. G.]. Aug. 10, 1956 [May 11, 1955], No. 13674/55. Class 80 (2). A cruciform member for a universal joint comprises relatively pivotable inner, 7, and outer, 9, members resiliently coupled by laminated springs 19 in radial slots in the two members. One pair of arms 11 is rigid with the outer member 9 and the other pair 13 is rigid with the inner member 7 and extends through slots 15 in the outer member. Lubrication is provided by an inlet 21 and retained by end-covers 17 and felt oil seals round the arms 13.
Patent GB-484360-A (GB)
Title: Piezoelectric apparatus
IPC: H03H9/19
Filed: 1937-05-14
Abstract: 484,360. Piezo-electric crystal mountings. STANDARD TELEPHONES & CABLES, Ltd. May 14, 1937, No. 13698. Convention date, May 19, 1936. [Class 40 (v)] A zero or a predetermined positive or negative temperature coefficient of frequency is imparted to a piezoelectric crystal by selecting its dimensions, its orientation with respect to the crystalline axes, and the harmonic at which it is to be operated. The crystal 1, Fig. 4, is mounted for operation at its second harmonic, cross connections 40, 41 being made between the pairs 10, 11 and 12, 13 of electrodes, which are nodallv clamped between adjustable projections 31 and resiliently mounted projections 38. The electrodes may be of stainless steel, or the crystals may be plated with aluminium or other metal, which may form both the electrodes and the connections 40, 41. In another arrangement, the crystal may be mounted inside an insulating block 50, Fig. 7, with electrodes 10 .. 13 which can be opened as shown for removal of the crystal but in operation are closed so as to make contact with the crystal surfaces. They are cross-connected by means of the pins 51, 52. The depth of the crystal is parallel to the electric axis X, but the length and width are inclined at + 10<c>, or some other angle between + 5‹ and + 20‹, to the mechanical and optical axes, the sign of the angle taking account of whether the crystal is right-handed or left-handed. Curves, Figs. 10, 11, 12 (not shown) are given to show how a prescribed temperature coefficient of frequency, such as zero, can be reached by a series of successive reductions of the length and width of the crystal in combination with tests of the frequency and its temperature coefficient. Operation of the crystal at its second harmonic gives high piezo-electric activity, facilitates moimting, and gives increased accuracy of grinding on account of the increased size of the crystal, but other harmonics may be obtained by increasing the number of electrodes.
Patent GB-442927-A (GB)
Title: Improvements in and relating to method and apparatus for cleaning exhaust-filters for internal combustion engines
IPC: F01N3/20
Filed: 1935-05-10
Abstract: 442,927. Filtering gases. DEGEA AKT.-GES. AUERGES., 16, Rotherstrasse, Berlin. May 10, 1935, No. 13835. Convention date, Sept. 14, 1934. [Class 8 (ii)] [See also Group XXVII] A filter, preferably of the kind including a layer of catalyst, for purifying the exhaust gases of internal-combustion engines is cleaned of particles of soot, &c., by reversing the direction of the gases through the filtering- layer. In the form shown, the gases normally pass downwards, as indicated by the arrows, through filtering-material 4 arranged between screens 2, 3 in a casing 1, but they are caused to pass upwards through the filter by moving flap valves 5, 6 from the portions shown in full lines to those in dotted lines. The valves may be actuated by a handle 12 and wire 10, and may be retained in the dotted-line position by a spring 17 until the handle is released. If the valves are put in an intermediate position, the gases flow above and below the filter, and the casing 1 merely acts as a silencer.